US1793415A - Jack abutment - Google Patents

Description

Feb. 17, 1931. QUESENBERRY 1,793,415

JACK ABUTMENT Filed Dec. 22, 1928 6 6! Quasar/29 1 47 I Gnome Patented Feb. 17, 1931 oNrrEn stares HENRY o. QUESENBERBY, or nnn'r on, v ndiir'jiii JACK ABU'rMEnT Application filed December 22, 1928.. Serial Ne, 327,901.

It is within the provlnce of the disclosure to improve generally and to enhance the utility of devices of that type to which the in-- vention appertains. o

With the above and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and '20 claimed, it being understood that, within'the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in side elevation, a device constructed in accordance with the invention, and applied to one of the many uses of which it is capable; V

Figure 2 isa detail enlarged from Figure 1 Figure 3 is a front elevation;

Figure 4 is a cross section showing the abutment in top plan;

Figure 5 is a cross section showing the abut ment in bottom plan.

The device forming the subject matter of this application is capable of many uses in the hands of bridge carpenter or other mechanic, and it is not possible to mention, and much less to show, all of the uses towhich the device claimed may be put. A single illustration will be employed, and that Vwill be enough, since a skilled mechanic will be capable of using the device in a way which will solve the particular problem that happens r to be before him. As an illustration-then,-

and not as a limitation, there is shown 1n Figure 1, a sub-structure 1 which may be a sill from which extends a vertical post 2.

Suppose that it is desired to remove the ver- I a straightfend piece ti'cal post '2. Then "it" isthe practice: to: sup port, by means of an inclined brace 3, whatever the, post 2:maycarry,'thespost 2 being pulled out and being'replaced'by new post.

It is necessary toshove up the brace '23 so that J itwill support'the super-structure and a jack 41S employed for this purpose, the jack being mounted on a footing 5 carried by the substructure 1; Considerable difficulty has been experienced in providing'some means whereby the jack L can get a good hold on the in clined brace 3, and the present invention aims to provide a way out or" this difiiculty.

In carrying out the invention, there is provided a U-shaped metal bracket 6 including v 7 andstraight parallel side arms 8, disposed at right angles to the end piece 7 and connected thereto. The side 7 arms Sterminate in threaded stems 9 which pass removably through'a yoke bar 10. Nuts 9 11 are threaded on the stems 9 and engage the yoke bar 10. The threads on the stems 9 preferably are cut square, so as to withstand hard use. r

The end piece 7 of the bracket 6 is sup- 5, plied with an outstanding foot 12, which is roughened on its lower surface, as shown at 14, so that the jack 4: can get a good hold on it. There is a hole 15 in the foot- 12, so that scaffolding (not shown) or anything else, may be bolted to the foot 12. The end piece 7 of the bracket 6' has an upstanding extension 16 located at right angles .to the foot 12. Buttresses 17 connect the extension -l6 with the end piece 7 and with the foot 12.

When the nuts 11 are tightened up, the brace 3 will be bound tightly between the end piece 7 and the yoke bar 10, and the bracket 6 willbe held securely on thebrace. The

upper end of the jack l is engaged with the foot 12, and by feeding the jackupwardly, the brace 3 will be thrust upwardly as and for a purpose readily understood by any bridge carpenter, or wrecker. y

The extension 16 aids in withstanding the thrust of the ack 4 and keeps'the end piece 7 of the bracket 6 from biting intothe brace 8 under the thrust of the jack. Theextension, moreover, forms a place of anchorage for the buttresses 17, and'the buttresses, of course, re- 1M inforce the foot 12 and enable'it Withstand thethrust of the jack 4. V 7

As has beenstated in the opening portion of this specification, the bracket 6 may be used for many purposes other than the one shown in the drawings.

Having thus described-the inventioinwhat is claimed i's-:.-

In a jack abutment, a substantially U- shaped bracket comprising side arms located in a common plane, and an-endpiececonnect ing the arms, a jack-engaging foot outstandr ing'from the end piece parallel to said'plane, an extension projecting from the endpiece at right angles to said plane and having its inner surface flush withitheginnersurfaceofthe endv piece, the extension, constituting means for preventing the bracket from tilting under the thrust of a jack andlbiting into the 1nem- I ber that is straddled by the bracket and to Which-the jack: is to-be applied, areinforc ing buttress oined to, the footand to the extension, and clamping means cooperating withthe extension and; the end piece to hold the bracket in place onthe said member to Whichthe j ackis'to be applied, thevclamping means beingmounted: onthe side arms ofthe bracket.

In: testimony that I claim the foregoing as my own, I have hereto aflixed mysi'gnature.

c... UEsENBERRY.

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